I have a question about TEC controller ADN8834.
I can see an equation of f_0dB in DS at p18.
Can you explain what TECGAIN in it?
from Fig 35, 0dB should be at 1/(2*pi*R_1*C_1). But f_0dB of equation has x(R_FB/(R_TH + R_x) - R_FB/R)xTECGAIN.
I assume the followings;
1. TECGAIN is a varied value from device itself. It can change by hot mode or cold mode.
2. When users think of PID Compensation, they can ignore x(R_FB/(R_TH + R_x) - R_FB/R)xTECGAIN. The part would be canceled as x1 or very tiny???
Is my assumption correct?
If not, could you explain what it is?
I would like to know
- What is TECGAIN? and how can it be led in calculation?
- Why is x(R_FB/(R_TH + R_x) - R_FB/R)xTECGAIN ignored in Fig 35?
Thank you for your help.